WO2014109364A1 - Protection element - Google Patents
Protection element Download PDFInfo
- Publication number
- WO2014109364A1 WO2014109364A1 PCT/JP2014/050237 JP2014050237W WO2014109364A1 WO 2014109364 A1 WO2014109364 A1 WO 2014109364A1 JP 2014050237 W JP2014050237 W JP 2014050237W WO 2014109364 A1 WO2014109364 A1 WO 2014109364A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fuse member
- ptc element
- thermal fuse
- current
- protection
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
- H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
- H01H2085/0283—Structural association with a semiconductor device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/12—Two or more separate fusible members in parallel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/103—Fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a protection element having a PTC element and a thermal fuse member, and more particularly to a protection element for protecting an electric device, for example, a secondary battery pack, from excess current and / or excess voltage.
- the present invention also relates to a protection circuit including such a protection element.
- thermal fuse elements Conventionally, thermal fuse elements, current fuse elements, polymer PTC elements, and the like have been used to protect electrical devices from excessive current.
- thermal fuse elements in a chargeable / dischargeable secondary battery pack or the like, not only protection from excessive current but also protection from excessive voltage may be required to prevent overcharge.
- a protective element for protecting an electric device such as a secondary battery from such an excessive current and / or an excessive voltage for example, a low melting point metal member (corresponding to a thermal fuse member) and a heating element are provided on the substrate, and the voltage
- a protection element has been proposed in which a heating element is energized by a detection element that detects this abnormality, and a thermal fuse member is blown by heat generated from the heating element to interrupt the circuit (see Patent Document 1).
- a resistor (heating element) and a thermal fuse under the influence of the heat are arranged on the ceramic substrate. From the structure, a plurality of thermal fuses are arranged in parallel in the element. There is a problem that it is difficult to arrange, and therefore the rated capacity of the current cannot be increased (for example, in the case of an existing protection element, the rated current is about 15 A). For this reason, in order to cope with a device requiring a large current such as a power tool, a single element cannot be used, and a plurality of, for example, four protection elements must be used in parallel. There is a problem that it becomes complicated and it becomes difficult to reduce the size.
- the problem to be solved by the present invention is to provide protection against excess current and / or voltage, and even in an electric circuit that flows a relatively large current, for example, 30 A or more. It is an object of the present invention to provide a protective element that can appropriately protect an electric circuit with the element.
- the present invention provides: A PTC element having a layered PTC element, a first conductive metal layer located on one main surface thereof, and a second conductive metal layer located on the other main surface; An insulating layer located on the second conductive metal layer of the PTC element; A thermal fuse member positioned on the insulating layer; a first lead connected to one end of the thermal fuse member; a second lead connected to the other end; and a portion of the second lead Is electrically connected to the second conductive metal layer, A protective element is provided.
- the protection element of the present invention causes a current to flow from the switching element to the PTC element in response to excess voltage and / or excess current, thereby bringing the PTC element into a high temperature / high resistance state, that is, causing the PTC element to trip.
- the thermal fuse member is melted by the generated Joule heat. That is, in the protection element of the present invention, the thermal fuse member is under the thermal influence of the PTC element in the trip state.
- the protective element of the present invention includes a PTC element having a layered PTC element, a first conductive metal layer located on one main surface thereof, and a second conductive metal layer located on the other main surface.
- the PTC element is not particularly limited, but is preferably a so-called polymer PTC element.
- the polymer PTC element is formed by extruding a conductive polymer composition containing, for example, a polymer (eg, polyethylene, polyvinylidene fluoride, etc.) and a conductive filler (eg, nickel filler, carbon filler, etc.) dispersed therein.
- the PTC element of the present invention functions as a heating element by tripping to a high temperature / high resistance state in response to an excess voltage and / or an excess current. Further, the PTC element of the present invention has a function as a substrate for holding a temperature fuse member and the like in addition to a function as a heating element.
- a polymer PTC element as a substrate, processing such as cutting is facilitated and the structure of the protection element is simplified as compared with the case of using a ceramic substrate.
- the protective element of the present invention has an insulating layer located on the second conductive metal layer of the PTC element. This insulating layer electrically insulates the first lead and the second conductive metal layer of the PTC element. With such a structure, after the thermal fuse member is melted, the current flow path from the first lead to the second lead via the PTC element can be interrupted.
- the insulating layer is made of an insulating material. Although it does not specifically limit as an insulating material, Preferably resin, ceramic, silicone, insulating oil, paper, etc. are mentioned. In particular, those excellent in thermal conductivity are preferable. By using an insulating material having excellent thermal conductivity, Joule heat generated in the PTC element can be more efficiently transmitted to the thermal fuse member.
- Such an insulating material having excellent thermal conductivity is not particularly limited, and examples thereof include ceramic and silicone.
- the insulating layer is not necessarily required to cover the entire second conductive metal layer of the PTC element. After the thermal fuse member is melted, leads on both ends of the thermal fuse member are interposed via the second conductive metal layer of the PTC element.
- the shape and arrangement of the insulating layer are not particularly limited as long as the current flowing between the first lead and the second lead described below can be interrupted.
- the insulating layer has a part of the second conductive metal layer exposed. Can be arranged to do. Thus, by exposing a part of the second conductive metal layer, it is possible to facilitate electrical connection between the second conductive metal layer and the second lead.
- the thickness of the insulating layer is not particularly limited, but may be 10 to 100 ⁇ m, preferably 30 to 60 ⁇ m. The thinner the insulating layer, the more efficiently Joule heat generated in the PTC element can be transmitted to the thermal fuse member. Moreover, in order to ensure electrical insulation between the thermal fuse member and the second conductive metal layer, it is preferably 30 ⁇ m or more.
- the protective element of the present invention has a thermal fuse member located on the insulating layer.
- the thermal fuse member has leads (hereinafter referred to as a first lead and a second lead, respectively) as terminals (electrodes) connected to both ends thereof.
- This fuse member is formed of a metal material having a predetermined melting point, for example, Sn, Bi, Pb, Cd, In, Ga, Zn or the like.
- a person skilled in the art can appropriately select, obtain or manufacture such a thermal fuse member according to desired characteristics in consideration of the temperature at the time of trip of the PTC element.
- a plurality of, for example, 2 to 10, and preferably 2 to 4 thermal fuse members can be arranged in parallel on the PTC element. By increasing the number of thermal fuse members in parallel, the rated capacity of the current of the protection element of the present invention can be increased.
- the thermal fuse member is disposed so as to be under the influence of heat of the PTC element. That is, the thermal fuse member is arranged to be blown by Joule heat generated in the tripped PTC element. Preferably, the thermal fuse member is entirely disposed on the insulating layer. By arranging in this way, when an excess voltage and / or excess current is detected, current is passed through the PTC element, and the PTC element trips, the thermal fuse member is blown by Joule heat generated in the PTC element, A current interruption can be secured.
- the first lead connected to one end of the thermal fuse member should not be in contact with the second conductive metal layer of the PTC element, and preferably the connecting portion between the fuse member and the first lead is located on the insulating layer. Placed in.
- a part of the second lead connected to one end of the thermal fuse member is electrically connected to the second conductive metal layer of the PTC element.
- the protection element of the present invention further includes a second thermal fuse member connected in series to the PTC element.
- the second thermal fuse member may be connected in series or in parallel to the first thermal fuse member, but is preferably connected in series.
- the second thermal fuse member is under the thermal influence of the PTC element, and when an excess voltage and / or excess current is detected, current is passed through the PTC element, and the PTC element trips, the Joule generated in the PTC element Fusing by heat.
- the switching element is connected to the circuit via the PTC element. It is possible to cut off the inflowing minute current (leakage current) and make the circuit completely open.
- the second thermal fuse member include those similar to those used for the first thermal fuse member.
- the second thermal fuse member may be the same as or different from the first thermal fuse member.
- the second thermal fuse member is also connected in series to the first thermal fuse member, or the first thermal fuse member It is preferable that the installation conditions, for example, the distance from the PTC element, and the like are adjusted so as to be cut after the thermal fuse member. Further, when the second thermal fuse member is different from the first thermal fuse member, the second thermal fuse member has a characteristic of being blown after the first thermal fuse member. Is preferred. A person skilled in the art can appropriately select the type and arrangement of the second thermal fuse member according to desired characteristics.
- the protective element of the present invention has a current fuse member connected in series to the first thermal fuse member.
- the current fuse member is blown when an excessive current flows in the circuit. That is, by arranging such a current fuse member, it is possible to more quickly and reliably protect the circuit from excessive current.
- a person skilled in the art can appropriately select a current fuse member to be used according to desired characteristics.
- the protection element of the present invention includes a second PTC element and a second PTC element connected in series to the second PTC element and under the thermal influence of the second PTC element.
- 3 thermal fuse members which are connected in parallel to the first thermal fuse member (and the current fuse member and the second thermal fuse member, if present).
- the first thermal fuse member (and the current fuse member and the second thermal fuse member, if present) is blown, a joule generated in the second PTC element tripped by the commutated current is generated.
- the third thermal fuse member is melted by heat, and a minute current passing through the second PTC element can be completely cut off.
- the third thermal fuse member is blown, only a very small current flows through the circuit, so that it can be safely shut off.
- the present invention provides: There is provided a protection circuit comprising the protection element of the present invention and a switching element for energizing the PTC element of the protection element in response to an excess current and / or an excess voltage.
- the protection element of the present invention includes, for example, a first lead connected to a power source, a second lead connected to a protected device, a first conductive metal layer connected to a switching element, The two conductive metal layers are connected to the protected device through the second lead.
- the switching element supplies current to the PTC element accordingly, the PTC element trips to a high temperature / high resistance state, and the thermal fuse member is blown by Joule heat generated in the PTC element. Then, the circuit is opened and the protected device is protected.
- examples of the switching element include a field effect transistor element (hereinafter also referred to as “FET”).
- FET field effect transistor element
- the FET is particularly preferable because a current can be passed through the PTC element in accordance with an abnormal voltage.
- the present invention relates to an electric device (for example, a secondary battery pack, particularly an electric vehicle, a cordless cleaner, an electric tool, a radio base station, or the like having a protective element or a protective circuit). Used, in particular for high voltage and / or high current).
- a secondary battery pack particularly an electric vehicle, a cordless cleaner, an electric tool, a radio base station, or the like having a protective element or a protective circuit. Used, in particular for high voltage and / or high current).
- the protection element of the present invention protects a circuit from excessive current and / or excessive voltage while allowing a large current, for example, 30 A or more, to flow because a plurality of thermal fuse members can be arranged on the PTC element. Enable.
- the PTC element and the first lead portion are electrically insulated by the insulating layer, the flow path from the first lead to the second lead via the PTC element is surely cut off after the thermal fuse member is melted. Can be.
- FIG. 1 is a schematic side view of one embodiment of the protection element of the present invention.
- FIG. 2 is a schematic plan view of the protection element of FIG.
- FIG. 3 is a circuit diagram schematically showing a protection circuit including the protection element of FIG.
- FIG. 4 is a circuit diagram schematically showing a protection circuit including another embodiment of the protection element of the present invention.
- FIG. 5 is a circuit diagram schematically showing a protection circuit including still another embodiment of the protection element of the present invention.
- FIG. 6 is a circuit diagram schematically showing a protection circuit including still another aspect of the protection element of the present invention.
- protection element of the present invention will be described in detail with reference to the drawings. However, it should be noted that the protection element of the present invention is not limited to the illustrated example.
- FIG. 1 shows a schematic side view of one embodiment of the protection element of the present invention
- FIG. 2 shows a schematic plan view of the protection element shown in FIG. 1
- FIG. 3 further includes the protection element of FIG.
- a protection circuit is schematically shown as an equivalent circuit.
- the portion surrounded by the dotted line corresponds to the protective element of the present invention.
- the protection element 10 of this embodiment includes a layered PTC element 12, a first conductive metal layer 14 located on one main surface thereof, and a position on the other main surface.
- a PTC element 18 having a second conductive metal layer 16, an insulating layer 20 positioned on the second conductive metal layer 16 of the PTC element 18; and a heat of the PTC element 18 positioned on the insulating layer 20. It has a fuse member 22 under influence, and a first lead 24 and a second lead 26 located at both ends thereof. Further, as shown in FIG. 1, a part of the second lead 26 is electrically connected to the second conductive metal layer 16 of the PTC element 18, and the second conductive metal layer 16 and the device to be protected are connected.
- each fuse member may have a separate first lead and second lead, and there may be two, three, or five thermal fuses.
- the FET causes a current to flow between the contact a-FET and the contact c.
- This current causes the PTC element 18 to trip and generate heat, and the heat causes the thermal fuse member 22 under the thermal influence of the PTC element 18 to melt and cut off the current (however, a minute current flows through the PCT element). sell).
- the protected devices connected to the contact x and the contact y are protected.
- FIG. 4 schematically shows another embodiment of the protection element of the present invention in an equivalent circuit.
- the portion surrounded by the dotted line corresponds to the protection element of the present invention.
- This embodiment has a second thermal fuse member 30 connected in series to the PTC element 18 in addition to the embodiment of FIG.
- the second thermal fuse member 30 is under the thermal influence of the PTC element 18. That is, the second thermal fuse member 30 is melted by Joule heat generated in the tripped PTC element 18.
- a minute current between the contact a-FET and the contact c that can flow through the PTC element 18 even after the thermal fuse member 22 is cut by the Joule heat generated in the PTC element 18 is used as the second temperature fuse.
- the member 30 can be cut off by fusing with the heat of the PTC element 18, and a complete open of the circuit can be achieved.
- the arrangement of the second thermal fuse member 30 is not limited to the illustrated position as long as it is connected in series to the PTC element 18 and is under the thermal influence of the PTC element.
- FIG. 5 schematically shows still another aspect of the protection element of the present invention with an equivalent circuit.
- the portion surrounded by the dotted line corresponds to the protection element of the present invention.
- This embodiment has a current fuse member 40 connected in series to the thermal fuse member 22 in addition to the embodiment of FIG. Since the current fuse member 40 is blown quickly when an excess current is generated, the protection against the excess current can be made quicker and more reliable.
- the arrangement of the current fuse member 40 is not particularly limited as long as it is in series with the temperature fuse member 22. It is preferable to connect in series.
- FIG. 6 schematically shows still another aspect of the protective element of the present invention in an equivalent circuit.
- a portion surrounded by a dotted line corresponds to the protection element of the present invention.
- This embodiment has a second PTC element 50 and a third thermal fuse member 52 in parallel with the thermal fuse member 22 and the current fuse member 40 in addition to the embodiment of FIG.
- the third thermal fuse member 52 is connected in series to the second PTC element 50 and is under the thermal influence of the second PTC element 50, but the thermal influence of the PTC element 18 is substantially reduced. I do not receive it.
- the thermal fuse member 22 and the current fuse member 40 are connected between the contacts de.
- each PTC element, current fuse member, and each temperature fuse member is not limited to the illustrated example as long as they are connected so as to exhibit the effects described above. Those skilled in the art can appropriately select such an arrangement.
- the protective element of the present invention can be used in various electrical devices, for example, as a protective element for a secondary battery.
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Abstract
Description
層状PTC要素と、その一方の主表面上に位置する第1導電性金属層と、その他方の主表面上に位置する第2導電性金属層とを有するPTC素子、
上記PTC素子の第2導電性金属層上に位置する絶縁層、
上記絶縁層上に位置する温度ヒューズ部材、および
上記温度ヒューズ部材の一方の端に接続される第1リードと、その他方の端に接続される第2リード、ここに、第2リードの一部は、上記第2導電性金属層に電気的に接続されている、
を有して成る、保護素子を提供する。 In the first aspect, the present invention provides:
A PTC element having a layered PTC element, a first conductive metal layer located on one main surface thereof, and a second conductive metal layer located on the other main surface;
An insulating layer located on the second conductive metal layer of the PTC element;
A thermal fuse member positioned on the insulating layer; a first lead connected to one end of the thermal fuse member; a second lead connected to the other end; and a portion of the second lead Is electrically connected to the second conductive metal layer,
A protective element is provided.
上記の本発明の保護素子、および
過剰電流および/または過剰電圧に応じて、上記保護素子のPTC素子に通電するためのスイッチング素子
を有して成る、保護回路を提供する。 In the second aspect, the present invention provides:
There is provided a protection circuit comprising the protection element of the present invention and a switching element for energizing the PTC element of the protection element in response to an excess current and / or an excess voltage.
12 層状PTC要素
14 第1導電性金属層
16 第2導電性金属層
18 PTC素子
20 絶縁層
22 温度ヒューズ部材
24 第1リード
26 第2リード
30 第2の温度ヒューズ部材
40 電流ヒューズ部材
50 第2のPTC素子
52 第3の温度ヒューズ部材 DESCRIPTION OF
Claims (8)
- 層状PTC要素と、その一方の主表面上に位置する第1導電性金属層と、その他方の主表面上に位置する第2導電性金属層とを有するPTC素子、
上記PTC素子の第2導電性金属層上に位置する絶縁層、
上記絶縁層上に位置する温度ヒューズ部材、および
上記温度ヒューズ部材の一方の端に接続される第1リードと、その他方の端に接続される第2リード、ここに、第2リードの一部は、上記第2導電性金属層に電気的に接続されている、
を有して成る、保護素子。 A PTC element having a layered PTC element, a first conductive metal layer located on one main surface thereof, and a second conductive metal layer located on the other main surface;
An insulating layer located on the second conductive metal layer of the PTC element;
A thermal fuse member positioned on the insulating layer; a first lead connected to one end of the thermal fuse member; a second lead connected to the other end; and a portion of the second lead Is electrically connected to the second conductive metal layer,
A protective element comprising: - さらに、第2の温度ヒューズ部材が、PTC素子に対して直列に接続されていることを特徴とする、請求項1記載の保護素子。 The protection element according to claim 1, further comprising a second temperature fuse member connected in series to the PTC element.
- 上記温度ヒューズ部材および/または第2の温度ヒューズ部材が、それぞれ2つ以上並列で存在することを特徴とする、請求項1または2記載の保護素子。 The protection element according to claim 1 or 2, wherein two or more of the thermal fuse members and / or second thermal fuse members exist in parallel.
- さらに、上記温度ヒューズ部材に対して直列に接続された電流ヒューズ部材を有してなる、請求項1~3のいずれかに記載の保護素子。 The protective element according to any one of claims 1 to 3, further comprising a current fuse member connected in series to the temperature fuse member.
- 請求項1~4のいずれかに記載の保護素子、および
過剰電流および/または過剰電圧に応じて、上記保護素子のPTC素子に通電するためのスイッチング素子
を有して成る、保護回路。 A protection circuit comprising: the protection element according to any one of claims 1 to 4; and a switching element for energizing the PTC element of the protection element in response to excess current and / or excess voltage. - 上記スイッチング素子が、電解効果トランジスタであることを特徴とする、請求項5に記載の保護回路。 The protection circuit according to claim 5, wherein the switching element is a field effect transistor.
- 請求項1~4のいずれかに記載の保護素子または請求項5または6に記載の保護回路を有して成ることを特徴とする電気装置。 An electric device comprising the protective element according to any one of claims 1 to 4 or the protective circuit according to claim 5 or 6.
- 2次電池セルである、請求項7に記載の電気装置。 The electric device according to claim 7, which is a secondary battery cell.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014556436A JP6417220B2 (en) | 2013-01-11 | 2014-01-09 | Protective element |
CN201480004548.1A CN104919670A (en) | 2013-01-11 | 2014-01-09 | Protection element |
KR1020157020892A KR20150106416A (en) | 2013-01-11 | 2014-01-09 | Protection element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-003653 | 2013-01-11 | ||
JP2013003653 | 2013-01-11 |
Publications (1)
Publication Number | Publication Date |
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WO2014109364A1 true WO2014109364A1 (en) | 2014-07-17 |
Family
ID=51167011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/050237 WO2014109364A1 (en) | 2013-01-11 | 2014-01-09 | Protection element |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP6417220B2 (en) |
KR (1) | KR20150106416A (en) |
CN (1) | CN104919670A (en) |
TW (1) | TWI609384B (en) |
WO (1) | WO2014109364A1 (en) |
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JP2017131021A (en) * | 2016-01-19 | 2017-07-27 | 株式会社オートネットワーク技術研究所 | Power supply control device |
CN108879591A (en) * | 2018-07-18 | 2018-11-23 | 深圳市沃特沃德股份有限公司 | High current power supply protection circuit |
JP2019506834A (en) * | 2016-04-11 | 2019-03-07 | エルジー・ケム・リミテッド | MOSFET relay protection device and method using signal detector and signal fuse |
EP3518256A1 (en) * | 2018-01-09 | 2019-07-31 | Littelfuse, Inc. | Reflowable thermal fuse |
EP3751592A4 (en) * | 2018-04-03 | 2021-05-05 | Xiamen Set Electronics Co., Ltd | High-voltage fuse |
CN114730679A (en) * | 2019-11-21 | 2022-07-08 | 力特保险丝公司 | Circuit protection device with positive temperature coefficient device and spare fuse |
WO2023038078A1 (en) * | 2021-09-10 | 2023-03-16 | デクセリアルズ株式会社 | Protective element and battery pack |
WO2024034323A1 (en) * | 2022-08-10 | 2024-02-15 | ボーンズ株式会社 | Current interruption device and charge/discharge control circuit |
US12040109B2 (en) | 2020-11-13 | 2024-07-16 | Littelfuse, Inc. | Circuit protection device with PTC device and backup fuse |
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US10895609B2 (en) * | 2019-05-09 | 2021-01-19 | Littelfuse, Inc. | Circuit protection device with PTC element and secondary fuse |
JP7340979B2 (en) * | 2019-07-22 | 2023-09-08 | デクセリアルズ株式会社 | Protection elements and protection circuits |
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- 2014-01-09 WO PCT/JP2014/050237 patent/WO2014109364A1/en active Application Filing
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EP3518256A1 (en) * | 2018-01-09 | 2019-07-31 | Littelfuse, Inc. | Reflowable thermal fuse |
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CN108879591A (en) * | 2018-07-18 | 2018-11-23 | 深圳市沃特沃德股份有限公司 | High current power supply protection circuit |
CN114730679A (en) * | 2019-11-21 | 2022-07-08 | 力特保险丝公司 | Circuit protection device with positive temperature coefficient device and spare fuse |
JP2023502570A (en) * | 2019-11-21 | 2023-01-25 | リテルフューズ、インコーポレイテッド | Circuit protector with PTC device and backup fuse |
JP7347771B2 (en) | 2019-11-21 | 2023-09-20 | リテルフューズ、インコーポレイテッド | Circuit protection device with PTC device and backup fuse |
US12040109B2 (en) | 2020-11-13 | 2024-07-16 | Littelfuse, Inc. | Circuit protection device with PTC device and backup fuse |
WO2023038078A1 (en) * | 2021-09-10 | 2023-03-16 | デクセリアルズ株式会社 | Protective element and battery pack |
WO2024034323A1 (en) * | 2022-08-10 | 2024-02-15 | ボーンズ株式会社 | Current interruption device and charge/discharge control circuit |
Also Published As
Publication number | Publication date |
---|---|
TW201440084A (en) | 2014-10-16 |
JP6417220B2 (en) | 2018-10-31 |
TWI609384B (en) | 2017-12-21 |
CN104919670A (en) | 2015-09-16 |
JPWO2014109364A1 (en) | 2017-01-19 |
KR20150106416A (en) | 2015-09-21 |
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